Layered composites made of polymer derived SiOC/ZrB_(2) reinforced by ZrO_(2)/SiO_(2) fibers with simultaneous microwave absorption and thermal insulation  

作　　者：Yumeng Deng Bin Ren Yujun Jia Qian Wang Hejun Li 

机构地区：[1]State Key Laboratory of Solidification Processing,Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials,Northwestern Polytechnical University,Xi’an 710072,China [2]Henan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,China

出　　处：《Journal of Materials Science & Technology》2024年第29期50-59,共10页材料科学技术(英文版)

基　　金：supported by the National Natural Science Foun-dation of China(Nos.52232005,52172104,and 52293370);the Fundamental Research Funds for the Central Universities(China,Nos.3102020QD0411 and D5000220152);the Creative Re-search Foundation of Science and Technology on Thermo-Structural Composite Materials Laboratory.

摘　　要：To simultaneously improve the microwave absorption and thermal insulation properties of the ceramic materials for stealth high-speed vehicles,layered composites made of polymer-derived SiOC/ZrB_(2) rein-forced by ZrO_(2)/SiO_(2) fibers were reported in this work.The composites possess a continuous multilayer structure,which was fabricated via the precursor impregnation assisted by hot press curing and pyrolysis using the transparent ZrO_(2)/SiO_(2) fibers and polymer-derived SiOC and nano ZrB_(2).The layered composites show an effective absorption band(EAB)of 4.2 GHz at a thickness of 2.9 mm and a minimum reflection loss of-59.34 dB.The exceptional electromagnetic(EM)wave attenuation capability is ascribed to the impedance matching as well as massive EM wave loss caused by the multilayers in which the nano ZrB_(2) provides interfacial polarization and electrical conduction loss.With a design of the multi-curvature arch structure,a remarkable reduction of radar cross section can be achieved.Besides,the layered composites exhibit good oxidation resistance and thermal insulation when exposed to the dynamic heating environ-ment,demonstrating the potential application in harsh environments used for multifunctional electro-magnetic absorbing materials.

关 键 词：Polymer derived ceramic (ZrO_(2)-SiO_(2))fiber Electromagnetic wave absorption Broadband radar cross section reduction Thermal insulation 

分 类 号：TB3[一般工业技术—材料科学与工程]